Governor.



` Patented Nov. 4, |9112.A

M. J. HEWLETT.

GovERNoR.

(Application led Mair. 10, 1902.)

2 Sheets-Sheet I.

(No Model.)

. moro-Limo., wLsmNmoN n c No. 7I2,534. 4 Patented Nov. 4, |902. Y M. J. HEWLETT.

G ovannon.

(Application med am'. 1o, 1992. (No Modl.) 2 Sheets-$heai 2.

UNITED STATES PATENT OEEICE.

MADDRA J. HEWLETT, OF KEWANEE, ILLINOIS, ASSIGNOR TO HIMSELF AND ALFRED M. HEWLETT, OF KEWANEE, ILLINOIS.

GOVERNOR.

SPEGIFICATON forming part of LettersPatent No. 712,534, dated November 4, 1902.

' application flied March 1o, 1902. serai no. 97,491. m0 man.)

To a/ZZ whom, if 17m/y concern;

Be it known that I, MADDRA .LHEWLETE a l citizen of the United States, residing at Kewanee, in the county of I-Ienry and State of Illinois, have invented certain new and useful Improvements in Governors, of which the following is a specification, reference being had tothe accompanying drawings.

My invention relates to governors for regu# lating and controlling the steam supplied to engines, and has for its objectto provide an improved governer which .will operate to maintain the speed of the engine at a practically constant point, the operating `mechany ism therefor being arranged so that the valve mechanism may readily `be operated inde# pendently of the automatic controlling mechanism therefor; also,- toprovide improved means for operating the valve from the automatic mechanism.

I accomplish my object as hereinafter dey scribed and as illustrated in the drawings.

That which I regard as new will be set forth in the claims.

. In the drawings, Figure 1 is a side elevation, some parts being broken away. Fig. 2 is a longitudinal vertical section on line 2 2 of Fig. 1. Fig. 3 is a sectional detail on line 3 3 of Fig. 1, and Fig. 4 is a cross-section on line 4 4 of Fig. 1. i

Referring to the drawings, 5 indicates the frame of the machine, which may be of any suitable form and construction.

6 indicates the governor-shaft, which is vertically disposed and is supported in the frame 5, as will be hereinafter explained. The shaft 6 is vertically movable, as will hereinafter appear. Near its upper end the shaft 6 is provided with an annular groove 7 as shown in Fig. 2.

8 indicates a beveled pinion which is mounted on the shaft 6 near its upper end and has extended hubs 9 10, whichproject in op posite directions from the said pinion, as shown inFig. 2. The pinion 8 is mounted to rotate about a vertical axis and is connected with the shaft 6 by means of a 'feather 4, so that said pinion and shaft rotate together, but longitudinal movement of the shaft 6 is not interfered with. The hubs 9 10 of said pinion support the shaft 6 and serve to hold .it in position. The hub 9 of the pinion 8 carries at its upper end a head 11, by which are pivotally supported governor-balls 12 13, as shown in Fig. 2. Said balls have arms 14 15, respectively mounted on pivots 16 17, carried at opposite ends of the head 11 and at opposite sides of the upper end of the shaft c6, as shown. The arms 14 15 carry, respectively, fingers 18 19, `which project into the groove 7 of the shaft 6, the arrangement be .ing sucl1that as the balls 12 13 move upward and downward through centrifugal action the Afingers. 18 19 by their engagement with the shaft 6 cause it to move vertically. The pinion 8 is causedtorotate by means of a beveled pinion 20, mounted; on a shaft 21, `said pinion 2O being in mesh with the pinion 8, as shown in Fig. 2. Said pinion 2O is keyed to the shaft 21, which is in turn caused to rotate in unison with the engine the speed of which is to be regulated by means of a pulley 22, mounted upon and keyed to said shaft. The pulley 22 is connected by a belt or other suitable mechanism with the engine, so that thespeed of the engine controls the speed of rotation of the pinion 8, and consequently theposition of the governor-balls 12 13 and shaft 6.

`Insteadof using the specific devices described and shown for operating the pinion 8 23 indicates a collar mounted on the lower end of the hub 10 and keyed thereto, as shown in Fig. 2. Said collar abuts against the lower end of a sleeve 24, carried by the frame, which sleeve forms a bearing for said hub and supports the pinion 8. The collar 23 serves to revent displacement of the pinion 8.

25 indicates apinion which is loosely mounted on the shaft 6, near the lower endthereof, and is adapted to rotate thereupon. The pinion 25 is provided with an upwardly-.extending hub 26, which tits in a bearing 27, `carried by the frame 5, in line with the bearing 24. A collar 28, similar to the collar 23, is secured upon the upper end of the hub 26and serves to hold the pinion 25 in position without interfering with the speed of rotation inother suitable and equivalent means may be employed.

IOO

dependently of the shaft 6. On its under side the pinion 25 carries a clutch-section 29, as shown in Fig. 2.

` 30 indicates a beveled pinion which is arranged opposite to the beveled pinion 25, with its axis coincident with that of the shaft 6. The pinion 30 is mounted upon the upper end of a short shaft 31, which is journaled in a suitable box 32, carried by the frame of the machine, as shown in Fig. 2. The pinion 30 carries on its upper face a clutch-section 33, which lies opposite the clutch-section 29.

34 indicates a clutch which is mounted upon the lower end of the shaft 6, between the pinions 25 and 30, as shown in Fig. 2. Said clutch is keyed to the shaft 6, as shown, and is adapted to be moved into engagement with one or the other of the sections 29 and 33 by a longitudinal movement of the governor-shaft. 6. Its width is such that when necessary it may lie between said clutch-sections and out of engagement with both.

35 indicates a beveled pinion mounted to rotate about a horizontal axis and meshing constantly with the pinions 25 and 30. The pinion 35 is provided with a stem 36, which is supported in a suitable bearing 37, carried by the frame of the machine, as shown in Fig. 2. The stem 36 carries, at the end opposite the pinion 35, a disk 38, which is pivotally connected by lugs 39 or bya Hook universal joint with a Worm-shaft 40, the outer end of which is supported in a bearing-block 41, pivotally carried by a lever 42, which is fulcrumed upon the frame of the machine upon a pivot 43, as shown in Fig. 2. By rocking the lever 42 the Worm-shaft 40 may be angularly adjusted to move it into or out of operative position, as will be hereinafter set forth.

44 indicates a worm-wheel` by the rotation of which the valve which controls the admission of steam is adjusted. Said worm-wheel is mounted in a suitable bearing 45 in the frame of the machine, as shown in Fig. 1, being provided with extended hub-sections 46 47, respectively, which extend in opposite directions, as shown. The hub-section 46 eX- tends through the bearing 45 and is provided with a collar 48, keyed thereto, secured in place by a set-screw 49. The collar 48 serves to prevent displacement of the worm-wheel.

50 indicates a hand-Wheel which is mounted on the hub-section 47 and is secured thereto by a key 51, as shown in Fig. 1.

The hub-sections 46 and 47 are internally screw-threaded and receive a screw-threaded shaft 52, which extends therethrough.

53 indicates the casing of the valve which controls the admission ot' steam.

54 indicates the valve-seat, 55 the valvedisk, and 56 the valve-stem. The stem 56 may be formed integral with the screw-threaded shaft 52 or may be connected therewith, as desired.

57 indicates a stung-box, through which the valve-stem passes.

58 indicates arms carried by thevalve-stem 56, which move in grooves 59 on the interior of the valve-casing, as shown in Fig. 4, thereby preventing the valve-stem and shaft 52 from rotating.

By the construction described rotation of the worm-wheel 44 effects longitudinal movement of the screw-threaded shaft 52 and valvestem 56 in one direction or the other, in one case the valve being opened and in the other closed to a greater or less extent. The rotation of the worm-wheel 44 is effected through the worm-shaft 40, which'is in turn rotated by means of one of the pinions 25 or 30, depending upon the connection made through the clutch 34. lf desired, the Worm-shaft 40 and worm-wheel 44 may be moved out of engagement by rocking the lever 42, thereby carrying the Worm-shaft 40 away from the Worm-Wheel.

The operation of the apparatus is as follows: The governor may be set to maintain a given speed by moving the Worm-shaft 40 out of engagement with the worm-Wheel and adjusting the position of the valve by means of the hand-Wheel 50. The parts are adjusted so that at the desired speed the governor-shaft 6 -is moved to an inoperative position-that is to say, so that the clutch 34 is out of engagement with both the pinions 25 and 30 when the balls 12 13 occupy the position which they assume when the engine moves at the speed which it is desired to maintain. Before the desired speedl is attained the balls 12 13 drop below what may be termed their normal position. Consequently the shaft 6 is moved up, carrying the clutch 34 into engagement with the clutch-section carried by the pinion 25. Inasmuch as the shaft 6 is rotated as soon as the engine starts through pulley 22, shaft 21, and pinions 2O and 8, the engagement of the clutch 34 with said pinion 25 causes it to rotate in the same direction as the pinion 8. Consequently the pinion 35 is rotated, rotating the Worm-shaft 40 and worm-wheel 44 in the directions indicated by the arrows in Fig. 2. Owing to the pitch of the threads on the screw-threaded shaft 52, this causes said shaft and also the valvestem 56 to move in the direction indicated by the arrow in Fig. 1, opening the valve Wider. The valve continues to open until the desired speed is attained, at which time the balls 12 13 arrive at their normal position, thereby moving the clutch 34 out of engagement with the pinion 25, but not far enough to move it into engagement with the pinion 30. The consequence is that the Worm-shaft 40 stops, stopping the worm-Wheel 44 and leaving the valve in the position which it had assumed when the clutch 34 and pinion 25 were disengaged. Should the speed of the engine be reduced, the balls 12 13 again carry the clutch 34 into engagement with pinion 25 and open the valve farther until the speed is restored. Similarly if the speed of the engine increases beyond that desired the governor- IOO balls 12 `13 move abovctheir normal position, carrying the clutch 34into engagementwith the clutch-section 33;"carried' by `'pinion 30. Said pinion being arranged oppositely to the pinion 25, the pinion 35 is 4caused to rotate in the opposite direction, reversing the rotation of the Worm-shaftO and Worin-wheel 44k', and

` i consequently closing the valve until the speed again reaches the normal, when the clutch 34 is disengaged from the pinion 30 and the movement of the valve ceases. It Will thus be seen that the governor` operates only when the speed of the engine varies fromV the normal and `that any such variation effects the adj ustinent of the valve necessary to restore the normal speed. `In other Words, the governor sets in operation `mechanism which continues to open or to close the valve, as may be necessary, until the speed reaches the normal or proper point.

That which I claim as my invention, and desire to secure by Letters Patent,`is#

l.` In a governor,the combination of a valve, a screw threaded stem for adjusting said valve, a worm-Wheel for operating said stem, a Worm for driving said Worm-WheeLoppositerly-actingpinions for rotating said worm- Wheel in one direction ortheothel-driving mechanism operated bvvariation of the speed of the engine forrotating said Worm through one or the other of said pinions and for i disconnecting said Worin from the driving mechanism ,and means for disconnecting saidwworm and worin-wheel, substantially-as described. o 2. In a governor,the combination ofa valve, a `screvv threaded stem for adjusting said valve, a Worm-Wheel for operating said stein, a Worni for driving' said Worm-Wheel, oppo-V sitely-acting pinions for rotatingV said `worm- ,Wheel in one direction or the other, driving mechanism operated by variationof the speed of the engine `for rotating said Worm through `one or the otherof saidpinions and` for disconnecting said Worm from the drivingmechanism,`means for disconnecting said Worm and Worin-Wheel, and independent means foratijusting said valve, substantially" as described.

- MADDEA` J. HEWLETT, Witnesses:

' CHARLES F. CULLOM,

R. W. GAMBLE. 

